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Our observation that intracellular NA concentrations did not increase following NNMT inhibition extends previous studies that showed NA concentrations were largely unaffected following NNMT knockdown with either adenovirus[39] or anti-sense oligonucleotides (ASOs).[12] It is possible that significant accumulation of NA in adipocytes (and other tissues) is prevented by rapid conversion of NA to NMN and subsequent NAD + synthesis or transport to the extracellular environment.[27] Importantly, NNMT inhibition potentiated the absolute intracellular concentrations of NAD + and SAM, without altering the levels of NA and SAH in the adipocytes

Clinical studies specifically monitoring glucose metabolism through oral glucose tolerance tests found no significant changes in glucose handling, and fasting insulin levels remained stable throughout treatment periods lasting up to 24 weeks

The role of defective clearance of apoptotic cells in systemic autoimmunity